33

UIDatePicker月と年のみを選択するために必要です。クラスリファレンスドキュメントを確認しました。UIDatePickerのように見えUIViewます。UIPickerViewサブビューである可能性があり、それをつかむことができればコンポーネントを非表示にできると想像しました。しかし、いいえ。それは不可能でした。その場合、独自のカスタム ピッカーを作成する必要がありますか? 何か案は？

4

11 に答える 11

16

同じ効果を得るための解決策を次に示します。このコード スニペットを使用するには、"Indentity inspector" の "Custom class" 内の nib ファイルにUIPickerView置き換える必要があります。CDatePickerViewEx

.h ファイル

#import <UIKit/UIKit.h>

@interface CDatePickerViewEx : UIPickerView <UIPickerViewDelegate, UIPickerViewDataSource> 

@property (nonatomic, strong, readonly) NSDate *date;
-(void)selectToday;

@end

.m ファイル

#import "CDatePickerViewEx.h"

// Identifiers of components
#define MONTH ( 0 )
#define YEAR ( 1 )    

// Identifies for component views
#define LABEL_TAG 43


@interface CDatePickerViewEx()

@property (nonatomic, strong) NSIndexPath *todayIndexPath;
@property (nonatomic, strong) NSArray *months;
@property (nonatomic, strong) NSArray *years;

-(NSArray *)nameOfYears;
-(NSArray *)nameOfMonths;
-(CGFloat)componentWidth;

-(UILabel *)labelForComponent:(NSInteger)component selected:(BOOL)selected;
-(NSString *)titleForRow:(NSInteger)row forComponent:(NSInteger)component;
-(NSIndexPath *)todayPath;
-(NSInteger)bigRowMonthCount;
-(NSInteger)bigRowYearCount;
-(NSString *)currentMonthName;
-(NSString *)currentYearName;

@end

@implementation CDatePickerViewEx

const NSInteger bigRowCount = 1000; 
const NSInteger minYear = 2008;
const NSInteger maxYear = 2030;
const CGFloat rowHeight = 44.f;
const NSInteger numberOfComponents = 2;

@synthesize todayIndexPath;
@synthesize months;
@synthesize years = _years;

-(void)awakeFromNib
{
    [super awakeFromNib];

    self.months = [self nameOfMonths];
    self.years = [self nameOfYears];
    self.todayIndexPath = [self todayPath];

    self.delegate = self;
    self.dataSource = self;

    [self selectToday];
}

-(NSDate *)date
{
    NSInteger monthCount = [self.months count];
    NSString *month = [self.months objectAtIndex:([self selectedRowInComponent:MONTH] % monthCount)];

    NSInteger yearCount = [self.years count];
    NSString *year = [self.years objectAtIndex:([self selectedRowInComponent:YEAR] % yearCount)];

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"MMMM:yyyy"];
    NSDate *date = [formatter dateFromString:[NSString stringWithFormat:@"%@:%@", month, year]];
    return date;
}

#pragma mark - UIPickerViewDelegate
-(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
{
    return [self componentWidth];
}

-(UIView *)pickerView: (UIPickerView *)pickerView
            viewForRow: (NSInteger)row
          forComponent: (NSInteger)component
           reusingView: (UIView *)view
{   
    BOOL selected = NO;    
    if(component == MONTH)
    {
        NSInteger monthCount = [self.months count];
        NSString *monthName = [self.months objectAtIndex:(row % monthCount)]; 
        NSString *currentMonthName = [self currentMonthName];
        if([monthName isEqualToString:currentMonthName] == YES)
        {
            selected = YES;
        }
    }
    else
    {
        NSInteger yearCount = [self.years count];
        NSString *yearName = [self.years objectAtIndex:(row % yearCount)];
        NSString *currenrYearName  = [self currentYearName];
        if([yearName isEqualToString:currenrYearName] == YES)
        {
            selected = YES;
        }
    }

    UILabel *returnView = nil;
    if(view.tag == LABEL_TAG)
    {
        returnView = (UILabel *)view;
    }
    else 
    {
        returnView = [self labelForComponent: component selected: selected];
    }

    returnView.textColor = selected ? [UIColor blueColor] : [UIColor blackColor];
    returnView.text = [self titleForRow:row forComponent:component];
    return returnView;
}

-(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
    return rowHeight;
}

#pragma mark - UIPickerViewDataSource
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return numberOfComponents;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    if(component == MONTH)
    {
        return [self bigRowMonthCount];
    }
    return [self bigRowYearCount];
}

#pragma mark - Util
-(NSInteger)bigRowMonthCount
{
    return [self.months count]  * bigRowCount;
}

-(NSInteger)bigRowYearCount
{
    return [self.years count]  * bigRowCount;
}

-(CGFloat)componentWidth
{
    return self.bounds.size.width / numberOfComponents;
}

-(NSString *)titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    if(component == MONTH)
    {
        NSInteger monthCount = [self.months count];
        return [self.months objectAtIndex:(row % monthCount)]; 
    }
    NSInteger yearCount = [self.years count];
    return [self.years objectAtIndex:(row % yearCount)];
}

-(UILabel *)labelForComponent:(NSInteger)component selected:(BOOL)selected
{
    CGRect frame = CGRectMake(0.f, 0.f, [self componentWidth],rowHeight);

    UILabel *label = [[UILabel alloc] initWithFrame:frame];
    label.textAlignment = UITextAlignmentCenter;
    label.backgroundColor = [UIColor clearColor];
    label.textColor = selected ? [UIColor blueColor] : [UIColor blackColor];
    label.font = [UIFont boldSystemFontOfSize:18.f];
    label.userInteractionEnabled = NO;

    label.tag = LABEL_TAG;

    return label;
}

-(NSArray *)nameOfMonths
{    
    NSDateFormatter *dateFormatter = [NSDateFormatter new];
    return [dateFormatter standaloneMonthSymbols];
}

-(NSArray *)nameOfYears
{
    NSMutableArray *years = [NSMutableArray array];

    for(NSInteger year = minYear; year <= maxYear; year++) 
    {
        NSString *yearStr = [NSString stringWithFormat:@"%i", year];
        [years addObject:yearStr];
    }
    return years;
}

-(void)selectToday
{
    [self selectRow: self.todayIndexPath.row
        inComponent: MONTH
           animated: NO];

    [self selectRow: self.todayIndexPath.section
        inComponent: YEAR
           animated: NO];
}

-(NSIndexPath *)todayPath // row - month ; section - year
{
    CGFloat row = 0.f;
    CGFloat section = 0.f;

    NSString *month = [self currentMonthName];
    NSString *year  = [self currentYearName];

    //set table on the middle
    for(NSString *cellMonth in self.months) 
    {
        if([cellMonth isEqualToString:month]) 
        {
            row = [self.months indexOfObject:cellMonth];
            row = row + [self bigRowMonthCount] / 2;
            break;
        }
    }

    for(NSString *cellYear in self.years) 
    {
        if([cellYear isEqualToString:year]) 
        {
            section = [self.years indexOfObject:cellYear];
            section = section + [self bigRowYearCount] / 2;
            break;
        }
    }

    return [NSIndexPath indexPathForRow:row inSection:section];
}

-(NSString *)currentMonthName
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"MMMM"];
    return [formatter stringFromDate:[NSDate date]];
}

-(NSString *)currentYearName
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy"];
    return [formatter stringFromDate:[NSDate date]];
}

@end
于 2012-06-22T06:09:29.993 に答える
11

ええ、おそらくあなたは自分のピッカーを作りたいと思うでしょう。ただし、サブクラス化する必要はありません。ジェネリックを使用して、 /メソッドUIPickerViewから適切な値を返すだけです。UIPickerViewDelegateUIPickerViewDataSource

于 2010-07-27T21:44:14.173 に答える
4

いいえ、ストックではできませんUIDatePicker。

UIDatePickerModeDate

日付ピッカーには、月、日、および年が表示されます。これらの項目の正確な順序は、ロケール設定によって異なります。このモードの例は [ 11 月 | 11 月 ] です。15 | 2007]。

出典: UIDatePicker クラス リファレンス

UIPickerViewをカスタマイズして 2 つのコンポーネントを使用し、その行に から取得した月と年の記号を入力することをお勧めしますNSDateFormatter。

于 2010-07-27T21:49:49.313 に答える
2

怠惰な回避策があります-10x10の黒いpngを作成しました。次に、それを、日付列を完全にカバーするサイズの scaletofill imageview を持つマスクとして使用しました。その列がほとんど表示されないように、アルファを 0.75 に設定しました。それはユーザーにとって明確であり、適切に見えます。

于 2011-01-14T03:51:31.797 に答える
1

私はUIPickerView2つのコンポーネント（月と年）を持つ単純なものを使用しています。

UIPickerViewDelegate行を選択するたびにを呼び出します。

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    //Today year and month
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"yyyy"];
    int year = [[dateFormat stringFromDate:[NSDate date]] intValue];
    [dateFormat setDateFormat:@"MM"];
    int month = [[dateFormat stringFromDate:[NSDate date]] intValue] - 1;

    //picker year and month
    int selectedYear = [[self.yearsArray objectAtIndex:[pickerView selectedRowInComponent:1]] intValue];
    int selectedMonth = [pickerView selectedRowInComponent:0];

    // if month in the past, change the month
    if (year == selectedYear && selectedMonth < month)
    {
        [pickerView selectRow:month inComponent:0 animated:YES];
    }
}
于 2013-11-22T13:36:33.370 に答える
1

以下のように、値の変更イベントが発生したときに、日を月の最初にリセットします。そのため、ユーザーが日を選択すると、スクロールして 1 日目に戻ります。開始日（月と年）の選択には以下を使用します。

-(void) resetDay {

 NSDate *currentDate  = [startDatePicker date];
 NSCalendar *gregorian = [[NSCalendar alloc]  initWithCalendarIdentifier:NSGregorianCalendar];
 NSDateComponents *componentsYear = [gregorian components:(NSYearCalendarUnit| NSMonthCalendarUnit) fromDate:currentDate];
 NSInteger yearNum = [ componentsYear year];
 NSInteger monthNum = [componentsYear month];
 NSLog(@"Month %d, Year %d", monthNum, yearNum);

 NSDateComponents *componentStartDate = [[NSDateComponents alloc] init];
 [componentStartDate setDay:1];
 [componentStartDate setMonth:monthNum];
 [componentStartDate setYear:yearNum];
 NSDate *startDate = [gregorian dateFromComponents:componentStartDate];

 [startDatePicker setDate:startDate animated:YES];
 [componentStartDate release];
 [gregorian release];
}

終了日 (月と年) を選択するには、選択した月の 31 日または 30 日に日を設定したかったので、少し長くなります。

-(NSInteger) findDaysInYear {
    NSDate *currentDate = [NSDate date];
    NSCalendar *gregorian = [[NSCalendar alloc]  initWithCalendarIdentifier:NSGregorianCalendar];


    NSDateComponents *componentsYear = [gregorian components:(NSYearCalendarUnit)   fromDate:currentDate];
    NSInteger yearNum = [ componentsYear year];

    NSDateComponents *componentStartDate = [[NSDateComponents alloc] init];
    [componentStartDate setDay:1];
    [componentStartDate setMonth:1];
    [componentStartDate setYear:yearNum];
    NSDate *startDate = [gregorian dateFromComponents:componentStartDate];
    NSLog(@"Start date set to %@", startDate);

    NSDateComponents *componentEndDate = [[NSDateComponents alloc] init];
    [componentEndDate setDay:31];
    [componentEndDate setMonth:12];
    [componentEndDate setYear:yearNum];

    NSDate *endDate = [gregorian dateFromComponents:componentEndDate];
    NSLog(@"End date set to %@", endDate);

    NSUInteger unitFlags = NSDayCalendarUnit ;
    NSDateComponents *componentsDay = [gregorian components:unitFlags   fromDate:startDate    toDate:endDate options:0];
    NSInteger days = [componentsDay day] +1;
    NSLog(@"Number of days in the year:%d, is %d", yearNum,days);
    [componentEndDate release];
    [componentStartDate release];
    [gregorian release];
    if (days != 365 && days != 366) {
        return 366;
    }
    return days;
}
-(NSInteger) findDaysInMonth:(NSInteger) monthNum {

    NSInteger days = 30;


    switch (monthNum) {
        case 1:
            days = 31;
            break;
        case 2:
            if([self findDaysInYear] == 366)        days = 29;
            else days = 28;
            break;
        case 3:
            days = 31;
            break;
        case 4:
            days = 30;
            break;
        case 5:
            days = 31;
            break;
        case 6:
            days = 30;
            break;
        case 7:
            days = 31;
            break;
        case 8:
            days = 31;
            break;
        case 9:
            days = 30;
            break;
        case 10:
            days = 31;
            break;
        case 11:
            days = 30;
            break;
        case 12:
            days = 31;
            break;
        default:
            break;
    }
    return days;

}

-(void) resetDay {

    NSDate *currentDate  = [endDatePicker date];
    NSCalendar *gregorian = [[NSCalendar alloc]  initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *componentsYear = [gregorian components:(NSYearCalendarUnit| NSMonthCalendarUnit)  fromDate:currentDate];
    NSInteger yearNum = [ componentsYear year];
    NSInteger monthNum = [componentsYear month];

    NSDateComponents *componentStartDate = [[NSDateComponents alloc] init];
    [componentStartDate setDay:[self findDaysInMonth:monthNum]];
    [componentStartDate setMonth:monthNum];
    [componentStartDate setYear:yearNum];
    NSDate *startDate = [gregorian dateFromComponents:componentStartDate];

    [endDatePicker setDate:startDate animated:YES];
    [componentStartDate release];
    [gregorian release];
}
于 2010-09-08T18:06:54.373 に答える
1

という名前のオープン ソース ライブラリを使用できます。

AKMonthYearPickerView

import AKMonthYearPickerView

AKMonthYearPickerView.sharedInstance.show(vc: viewController, doneHandler: doneHandler, completetionalHandler: completetionalHandler)

https://github.com/ali-cs/AKMonthYearPickerView

ポッドを使用してインストールするには、

pod 'AKMonthYearPickerView'

前年度の制限とバーの色をカスタマイズする

AKMonthYearPickerView.sharedInstance.barTintColor =   UIColor.blue

AKMonthYearPickerView.sharedInstance.previousYear = 4

ここに画像の説明を入力

于 2018-07-18T07:01:58.327 に答える
-3

次のように、日の列を非常に簡単に非表示にすることができます。

datePicker.subviews[0].subviews[0].subviews[1].hidden = true

楽しみ ：）

于 2016-01-19T15:13:18.173 に答える